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Minor speedup to do less linear time searches of information we already have.

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speeds up disassembly of kc++ by .6s


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10079 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2003-11-19 06:01:12 +00:00
parent cc33d70a92
commit 1c3673b238
3 changed files with 12 additions and 10 deletions
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12
lib/Bytecode/Reader/ConstantReader.cpp
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@ -168,13 +168,11 @@ Constant *BytecodeParser::parseConstantValue(const unsigned char *&Buf,
unsigned ArgValSlot, ArgTypeSlot;
if (read_vbr(Buf, EndBuf, ArgValSlot)) throw Error_readvbr;
if (read_vbr(Buf, EndBuf, ArgTypeSlot)) throw Error_readvbr;
const Type *ArgTy = getType(ArgTypeSlot);
BCR_TRACE(4, "CE Arg " << i << ": Type: '" << *ArgTy << "' slot: "
<< ArgValSlot << "\n");
BCR_TRACE(4, "CE Arg " << i << ": Type: '" << *getType(ArgTypeSlot)
<< "' slot: " << ArgValSlot << "\n");
// Get the arg value from its slot if it exists, otherwise a placeholder
ArgVec.push_back(getConstantValue(ArgTy, ArgValSlot));
ArgVec.push_back(getConstantValue(ArgTypeSlot, ArgValSlot));
}
// Construct a ConstantExpr of the appropriate kind
@ -245,12 +243,12 @@ Constant *BytecodeParser::parseConstantValue(const unsigned char *&Buf,
case Type::ArrayTyID: {
const ArrayType *AT = cast<ArrayType>(Ty);
unsigned NumElements = AT->getNumElements();
unsigned TypeSlot = getTypeSlot(AT->getElementType());
std::vector<Constant*> Elements;
while (NumElements--) { // Read all of the elements of the constant.
unsigned Slot;
if (read_vbr(Buf, EndBuf, Slot)) throw Error_readvbr;
Elements.push_back(getConstantValue(AT->getElementType(), Slot));
Elements.push_back(getConstantValue(TypeSlot, Slot));
}
return ConstantArray::get(AT, Elements);
}

5
lib/Bytecode/Reader/Reader.cpp
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@ -172,13 +172,14 @@ BasicBlock *BytecodeParser::getBasicBlock(unsigned ID) {
/// constant hasn't been parsed yet, a placeholder is defined and used. Later,
/// after the real value is parsed, the placeholder is eliminated.
///
Constant *BytecodeParser::getConstantValue(const Type *Ty, unsigned Slot) {
if (Value *V = getValue(Ty, Slot, false))
Constant *BytecodeParser::getConstantValue(unsigned TypeSlot, unsigned Slot) {
if (Value *V = getValue(TypeSlot, Slot, false))
if (Constant *C = dyn_cast<Constant>(V))
return C; // If we already have the value parsed, just return it
else
throw std::string("Reference of a value is expected to be a constant!");
const Type *Ty = getType(TypeSlot);
std::pair<const Type*, unsigned> Key(Ty, Slot);
GlobalRefsType::iterator I = GlobalRefs.lower_bound(Key);

5
lib/Bytecode/Reader/ReaderInternals.h
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@ -180,7 +180,10 @@ private:
Value *getValue(unsigned TypeID, unsigned num, bool Create = true);
const Type *getType(unsigned ID);
BasicBlock *getBasicBlock(unsigned ID);
Constant *getConstantValue(const Type *Ty, unsigned num);
Constant *getConstantValue(unsigned TypeID, unsigned num);
Constant *getConstantValue(const Type *Ty, unsigned num) {
return getConstantValue(getTypeSlot(Ty), num);
}
unsigned insertValue(Value *V, ValueTable &Table);
unsigned insertValue(Value *V, unsigned Type, ValueTable &Table);